BEGIN:VCALENDAR VERSION:2.0 PRODID:-// - ECPv6.16.3//NONSGML v1.0//EN CALSCALE:GREGORIAN METHOD:PUBLISH X-ORIGINAL-URL:https://aarms.math.ca X-WR-CALDESC:Events for REFRESH-INTERVAL;VALUE=DURATION:PT1H X-Robots-Tag:noindex X-PUBLISHED-TTL:PT1H BEGIN:VTIMEZONE TZID:America/Halifax BEGIN:DAYLIGHT TZOFFSETFROM:-0400 TZOFFSETTO:-0300 TZNAME:ADT DTSTART:20190310T060000 END:DAYLIGHT BEGIN:STANDARD TZOFFSETFROM:-0300 TZOFFSETTO:-0400 TZNAME:AST DTSTART:20191103T050000 END:STANDARD BEGIN:DAYLIGHT TZOFFSETFROM:-0400 TZOFFSETTO:-0300 TZNAME:ADT DTSTART:20200308T060000 END:DAYLIGHT BEGIN:STANDARD TZOFFSETFROM:-0300 TZOFFSETTO:-0400 TZNAME:AST DTSTART:20201101T050000 END:STANDARD BEGIN:DAYLIGHT TZOFFSETFROM:-0400 TZOFFSETTO:-0300 TZNAME:ADT DTSTART:20210314T060000 END:DAYLIGHT BEGIN:STANDARD TZOFFSETFROM:-0300 TZOFFSETTO:-0400 TZNAME:AST DTSTART:20211107T050000 END:STANDARD END:VTIMEZONE BEGIN:VTIMEZONE TZID:UTC BEGIN:STANDARD TZOFFSETFROM:+0000 TZOFFSETTO:+0000 TZNAME:UTC DTSTART:20190101T000000 END:STANDARD END:VTIMEZONE BEGIN:VEVENT DTSTART;TZID=America/Halifax:20201002T160000 DTEND;TZID=America/Halifax:20201002T170000 DTSTAMP:20260614T143932 CREATED:20200904T115630Z LAST-MODIFIED:20200927T175953Z UID:5461-1601654400-1601658000@aarms.math.ca SUMMARY:Dalhousie-AARMS AAMP Seminar: John Toth (McGill University) DESCRIPTION:Title: Pointwise bounds for joint eigenfunctions of quantum completely integrable (QCI) systems \nAbstract: I will discuss some recent results on improvements in supremum bounds for joint eigenfunctions of QCI systems together with sharp exponential decay estimates away from the projections of invariant Lagrangian tori (ie. in the microlocally forbidden region). This is joint work with Jeff Galkowski. \nThe Dalhousie-AARMS Analysis-Applied Math-Physics Seminar takes place on Fridays from 4 – 5 pm Atlantic Time over Zoom.  If you would like to attend\, please email the organizers for connection details. URL:https://aarms.math.ca/event/dalhousie-aarms-aamp-seminar-2020-10-02/ LOCATION:Zoom seminar CATEGORIES:AAMP Seminar ORGANIZER;CN="Suresh Eswarathasan":MAILTO:sr766936@dal.ca END:VEVENT BEGIN:VEVENT DTSTART;TZID=America/Halifax:20201014T153000 DTEND;TZID=America/Halifax:20201014T163000 DTSTAMP:20260614T143932 CREATED:20200904T115630Z LAST-MODIFIED:20201002T185318Z UID:5488-1602689400-1602693000@aarms.math.ca SUMMARY:Atlantic Graph Theory Seminar: David Pike (Memorial) DESCRIPTION:Perfect 1-Factorisations\n A matching in a graph is a subset of the edge set of such that no two edges of share a vertex. A 1-factor of a graph is a matching in which every vertex of is in one of the edges of . If is a -regular graph of even order then we can ask whether admits a 1-factorisation\, namely a partition of its edge set into 1-factors. \nSuppose that are the 1-factors of a 1-factorisation of a -regular graph . If\, for each \, the union yields a Hamilton cycle in \, then we say that is a perfect 1-factorisation. We will discuss some of the history and properties of 1-factorisations\, including the recent discovery of a perfect 1-factorisation of . \nThe Atlantic Graph Theory Seminar series will take place every Wednesday from 3:30-4:30 ADT online via zoom. The talks\, provided by researchers\, postdocs and graduate students\, will be on a variety of current topics in graph theory. If you would like to give a talk or attend\, please email one of the organizers (Jason Brown and Danielle Cox). URL:https://aarms.math.ca/event/atlantic-graph-theory-seminar-2020-10-14/ LOCATION:Zoom seminar CATEGORIES:Atlantic Graph Theory Seminar ORGANIZER;CN="Danielle Cox":MAILTO:danielle.cox@msvu.ca END:VEVENT BEGIN:VEVENT DTSTART;TZID=America/Halifax:20201016T160000 DTEND;TZID=America/Halifax:20201016T170000 DTSTAMP:20260614T143932 CREATED:20200904T115630Z LAST-MODIFIED:20200923T163932Z UID:5459-1602864000-1602867600@aarms.math.ca SUMMARY:Dalhousie-AARMS AAMP Seminar: Julie Rowlett (Chalmers\, Sweden) DESCRIPTION:Decisions and Disease\nDo you usually get a flu shot every year? Do you usually take preventive measures to avoid contracting sexually transmitted infections? It is reasonable to expect that while many people may answer `no‘ to the first question\, they may answer `yes‘ to the second question. In recent joint work with my PhD student\, Carl-Joar Karlsson\, we have discovered a mathematical explanation for these different choices. Here I will explain mathematical models we have developed that combine the spread of different types of diseases together with the evolution of human behavioral choices. These models create dynamical systems\, and the stable equilibrium points provide insights into both the spread of disease as well as the evolution of human behaviors. These insights may be relevant for both the current pandemic as well as any new diseases we may encounter in the future. \nThe Dalhousie-AARMS Analysis-Applied Math-Physics Seminar takes place on Fridays from 4 – 5 pm Atlantic Time over Zoom.  If you would like to attend\, please email the organizers for connection details. URL:https://aarms.math.ca/event/dalhousie-aarms-aamp-seminar-2020-10-16/ LOCATION:Zoom seminar CATEGORIES:AAMP Seminar ORGANIZER;CN="Suresh Eswarathasan":MAILTO:sr766936@dal.ca END:VEVENT BEGIN:VEVENT DTSTART;TZID=UTC:20201021T153000 DTEND;TZID=UTC:20201021T163000 DTSTAMP:20260614T143932 CREATED:20201006T115021Z LAST-MODIFIED:20201006T115021Z UID:5508-1603294200-1603297800@aarms.math.ca SUMMARY:Atlantic Graph Theory Seminar: Dr. Ben Cameron (University of Guelph) DESCRIPTION:Title: Families of graphs containing only finitely many vertex-critical graphs. \nIn this talk\, motivated by algorithmic aspects of graph colouring\, we will consider the problem of classifying vertex-critical graphs in families of graphs. We will complete a dichotomy theorem for the number of k-vertex-critical H-free graphs when H is a graph of order four. Our results also reduce the remaining open problem for graphs of all orders to two families of graphs. Toward implementing the corresponding graph colouring algorithms\, we then improve upon previous research to show tight upper bounds on the order and independence number of k-vertex-critical graphs in another family of graphs\, allowing for exhaustive generation of these graphs for k at most 7 . Joint work with Chính Hoàng and Joe Sawada URL:https://aarms.math.ca/event/atlantic-graph-theory-seminar-dr-ben-cameron-university-of-guelph/ LOCATION:Zoom seminar CATEGORIES:Atlantic Graph Theory Seminar ORGANIZER;CN="Jason Brown":MAILTO:jason.brown@dal.ca END:VEVENT BEGIN:VEVENT DTSTART;TZID=America/Halifax:20201023T160000 DTEND;TZID=America/Halifax:20201023T170000 DTSTAMP:20260614T143932 CREATED:20200904T115630Z LAST-MODIFIED:20201018T164418Z UID:5465-1603468800-1603472400@aarms.math.ca SUMMARY:Dalhousie-AARMS AAMP Seminar: Hari Kunduri (Memorial University) DESCRIPTION:Title: Geometric inequalities for axisymmetric black holes\nAbstract: In general relativity\, isolated\, dynamical black holes arise from asymptotically flat initial data for the Einstein equations. Such data are characterized by invariants such as the ADM mass and angular momentum. When angular momentum is conserved in the evolution\, the\nstandard picture of gravitational collapse suggests an inequality relating the ADM mass and angular momentum. Such geometric inequalities have been rigorously proved for axisymmetric\, asymptotically flat maximal initial data for the vacuum Einstein equations. I will discuss recent work on extending this class of inequalities to higher dimensions\, where a number of qualitative differences arise (e.g. black holes can have non-spherical horizon topology). In particular\, I will discuss how a lower bound for the mass\, in terms of a (regularized) harmonic energy functional is obtained. \nThe Dalhousie-AARMS Analysis-Applied Math-Physics Seminar takes place on Fridays from 4 – 5 pm Atlantic Time over Zoom.  If you would like to attend\, please email the organizers for connection details. URL:https://aarms.math.ca/event/dalhousie-aarms-aamp-seminar-2020-10-16-2/ LOCATION:Zoom seminar CATEGORIES:AAMP Seminar ORGANIZER;CN="Suresh Eswarathasan":MAILTO:sr766936@dal.ca END:VEVENT BEGIN:VEVENT DTSTART;TZID=America/Halifax:20201028T130000 DTEND;TZID=America/Halifax:20201028T140000 DTSTAMP:20260614T143932 CREATED:20200706T160843Z LAST-MODIFIED:20201007T215632Z UID:5388-1603890000-1603893600@aarms.math.ca SUMMARY:Atlantic GR Seminar: Turkuler Durgut (MUN) DESCRIPTION:Asymptotically Anti-de Sitter Gravitational Solitons\nIn this talk\, I will consider the stability of asymptotically anti-de Sitter gravitational solitons. These are globally stationary\, asymptotically (globally) AdS spacetimes with positive energy but without horizons. I will introduce my ongoing project investigating solutions of the linear wave equation in this class of backgrounds. I will provide analytical expressions for the behavior of the scalar field near the soliton bubble and at spatial infinity. The special BPS (supersymmetric) case will then be examined as an example of a solution where stable trapping occurs. This project is joint work with Dr. Hari K. Kunduri and Dr. Robie A. Hennigar. \nThe Atlantic General Relativity 2020 online postdoc/student seminar series is in the tradition of the annual AGR meetings\, providing a forum not only for students and postdocs to present their research and make professional contacts but also to facilitate connections and collaborations between all Atlantic Canadian relativists. The series is student-organized and includes all areas of classical and quantum gravity. Talks will occur on the last Wednesday of every month\, with each session consisting of two 30 minute talks. If you would like to attend\, please email the organizers for connection details. \nNote: all times are Atlantic Time URL:https://aarms.math.ca/event/atlantic-gr-seminar-2020-10-28/ LOCATION:Zoom seminar CATEGORIES:Atlantic GR Seminars END:VEVENT BEGIN:VEVENT DTSTART;TZID=UTC:20201028T153000 DTEND;TZID=UTC:20201028T163000 DTSTAMP:20260614T143932 CREATED:20201006T115021Z LAST-MODIFIED:20201108T225542Z UID:5565-1603899000-1603902600@aarms.math.ca SUMMARY:Atlantic Graph Theory Seminar: Iain Beaton (PhD Candidate\, Dalhousie University) DESCRIPTION:The Average Order of Dominating Sets of a Graph\nThis talk focuses on the average order of dominating sets of a graph. We find the extremal graphs for the maximum and minimum value over all graphs on n vertices\, while for trees we prove that the star minimizes the average order of dominating sets. We prove the average order of dominating sets in graphs without isolated vertices is at most 3n/4\, but provide evidence that the actual upper bound is 2n/3. Finally\, we show that the normalized average\, while dense in [1/2\,1]\, tends to 1/2 for almost all graphs. \nThe Atlantic Graph Theory Seminar series will take place every Wednesday from 3:30-4:30 ADT online via zoom. The talks\, provided by researchers\, postdocs and graduate students\, will be on a variety of current topics in graph theory. If you would like to give a talk or attend\, please email one of the organizers (Jason Brown and Danielle Cox). URL:https://aarms.math.ca/event/atlantic-graph-theory-seminar-2020-10-28/ LOCATION:Zoom seminar CATEGORIES:Atlantic Graph Theory Seminar ORGANIZER;CN="Jason Brown":MAILTO:jason.brown@dal.ca END:VEVENT BEGIN:VEVENT DTSTART;TZID=America/Halifax:20201030T160000 DTEND;TZID=America/Halifax:20201030T170000 DTSTAMP:20260614T143932 CREATED:20200904T115630Z LAST-MODIFIED:20201116T135614Z UID:5468-1604073600-1604077200@aarms.math.ca SUMMARY:Dalhousie-AARMS AAMP Seminar: Jean-Pierre Garbardo (McMaster University) DESCRIPTION:Title: Factorization of positive definite functions through convolution and the Turàn problem\n Abstract: If is a finite abelian group\, we call a subset symmetric if and whenever . We also let . We consider the problem of expressing an arbitrary positive definite function on as the convolution product of two positive definite functions\, one supported on and the other one supported on . We show that\, in the particular case where is the constant function \, this problem is related to the Tur\’an problem for positive definite functions. In the particular case of a finite abelian group\, this last problem asks the following question. Given a symmetric set \, find the maximum value of the sum if and is a positive definite function on supported on . We introduce the notion of  {\it dual Tur\’an problem for }\, which is essentially the Tur\’an problem for the set \, and show how the Tur\’an problem for and its dual are related\, and how the factorization mentioned above plays a role is solving both those problems. We will then give an overview of how these results can be extended to other abelian groups such as . \nThe Dalhousie-AARMS Analysis-Applied Math-Physics Seminar takes place on Fridays from 4 – 5 pm Atlantic Time over Zoom.  If you would like to attend\, please email the organizers for connection details. URL:https://aarms.math.ca/event/dalhousie-aarms-aamp-seminar-2020-10-16-2-2/ LOCATION:Zoom seminar CATEGORIES:AAMP Seminar ORGANIZER;CN="Suresh Eswarathasan":MAILTO:sr766936@dal.ca END:VEVENT END:VCALENDAR